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Finding the Fourth Proportional to 103,561.30, 155,341.95 and 85,846.60

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Solution

The fourth proportional to 103,561.30, 155,341.95 and 85,846.60 is: 128,769.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,561.30 : 155,341.95 = 85,846.60 : x
  2. Step 2: Convert to fraction form
    103,561.30/155,341.95 = 85,846.60/x
  3. Step 3: Cross multiply
    103,561.30x = 155,341.95 × 85,846.60
  4. Step 4: Simplify right side
    103,561.30x = 13,335,578,244.87
  5. Step 5: Solve for x
    x = 13,335,578,244.87/103,561.30
  6. Step 6: Final answer
    x = 128,769.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.